Messages in this thread Patch in this message | | | From | Laurentiu Tudor <> | Subject | [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr | Date | Thu, 24 Oct 2019 12:41:43 +0000 |
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Add an implementation of the newly introduced dma map op in the generic DMA IOMMU generic glue layer and wire it up.
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> --- drivers/iommu/dma-iommu.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index f321279baf9e..15e76232d697 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1091,6 +1091,21 @@ static unsigned long iommu_dma_get_merge_boundary(struct device *dev) return (1UL << __ffs(domain->pgsize_bitmap)) - 1; } +static void *iommu_dma_get_virt_addr(struct device *dev, dma_addr_t dma_handle) +{ + struct iommu_domain *domain = iommu_get_domain_for_dev(dev); + + if (domain) { + phys_addr_t phys; + + phys = iommu_iova_to_phys(domain, dma_handle); + if (phys) + return phys_to_virt(phys); + } + + return NULL; +} + static const struct dma_map_ops iommu_dma_ops = { .alloc = iommu_dma_alloc, .free = iommu_dma_free, @@ -1107,6 +1122,7 @@ static const struct dma_map_ops iommu_dma_ops = { .map_resource = iommu_dma_map_resource, .unmap_resource = iommu_dma_unmap_resource, .get_merge_boundary = iommu_dma_get_merge_boundary, + .get_virt_addr = iommu_dma_get_virt_addr, }; /* -- 2.17.1
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